KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 61. N:0 II. 21 



D. Rossii HOOK. FIL. et Harv. 



In the sublitoral region, on exposed coasts. Fuegia: Slogget Bay, large 

 drifted specimens (St. 47 b, 16. 3. 09). Falkland Islands, Cape Pembroke 

 (St. 3, 8. 11. 07). 



Distribution: Subantarct. Amer., Falkl., Kerg., Heard. I., S. Orkn., Victoria Land. 



D. ligulata (Lightf.) Lamx. 



Syn. D. firma (Ag.) Skottsb. Ant. Meeresalg. I, p. 21. 



Sublitoral; small specimens not rare in tide-pools. — Fuegia: Slogget Bay. 

 drifted (St. 47 b, 16. 3. 09); Orange Bay (St. 45, 11. 3. 09). Falkland Islands: 

 Cape Pembroke (St. 3, 8. 11. 07). South Georgia: Bay of Isles (St. 52, 24. 4,09). 

 — Gain, Flore algol., p. 38, does not think it advisable to regard D. firma as a se- 

 parate species. He may be right in this, and I admit that my material is less 

 homogeneous this time. The specimens from S. Georgia belong to the true firma in 

 the sense of the writer. I suspect that D. distans J. Ag. is another form of the 

 same species. I have seen the type in Herb. Agardh (Isles Malouines, Freycinet); 

 it is very flat, thin and narrow. The same form har ne ver been recorded a second time. 



Distribution: N. Atl. to coast of Afr., S. A ti. -subantarct., Graham Land, Pacif. 

 coast of N. Amer. 



D. herbacea (L.) Lamx. 



Fuegia: Slogget Bay, drifted, but quite fresh and intact (St. 47 b, 16. 3. 

 09). — This is generally regarded as a form of the preceding, but Grunow (Novara 

 p. 51) and Gain (Flore algol. p. 39) apologize for its validity as a species. 



Distribution: Pacif. coasts of Amer. to Fuegia, Cape of Good Hope. 



Elachistacese. 



Elachista Duby. 



E. rosarioides nov. spec. — Fig. 9 a — b, 10 a — c. 



Pusilla dense caespitosa sat expansa, parum gelatinosa, parte basali endophytica. 

 Cellulae basales magnae, hyalinse, e quibus egrediunt fila erecta moniliformia assimi- 

 lantia, breviora 350 — 500 ^ longa et 10 — 12 y. crassa, cellulis basalibus longis angustis, 

 5—7^ solum latis, longiora vel longissima crescentia suprabasali, ad 1600^ longa et 

 16 ji crassa. Pili basales, 12 — 18 [i. crassi. Sporangia basalia, clavata, 90 — 130 x 36— 42 \l. 

 Gametangia semel solum inventa, 30 — 60x6 — 7 m uniseriata. Adsunt specimina 

 verosimiliter hinc pertinentia, filis omnibus brevioribus ad 400 [x longis et 15 [i crassis, 

 basi angustis circ. 6—8 \l latis, gametangiis e superficie strati basalis fasciculatis, 

 lanceolato-linearibus, uniseriatis, 45 — 50 x 7 — 9 jt. 



Falkland Islands, on the »Chordaria»-shoots of Cwpidium : Cape Pem- 

 broke (St. 3, 7. 1. 08. sp.); Westpoint Island (St. 8, 5. 12. 07, sp. & gt.); Port 

 Louis (St. 11, 7. 2. 08, sp.). South Patagonia: Fitzroy Channel, Los Amigos, 

 on drifted Chordaria (18. 4. 08. gt.). 



